fd4d2918f1
git-svn-id: http://svn.openlayers.org/trunk/openlayers@3787 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
73 lines
1.9 KiB
JavaScript
73 lines
1.9 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under a modified BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/repository-license.txt
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* for the full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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*
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* Class: OpenLayers.Control.Scale
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* Display a small scale indicator on the map.
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* Inherits from:
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* - <OpenLayers.Control>
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*/
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OpenLayers.Control.Scale = OpenLayers.Class(OpenLayers.Control, {
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/**
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* Parameter: element
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* {DOMElement}
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*/
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element: null,
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/**
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* Constructor: OpenLayers.Control.Scale
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*
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* Parameters:
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* element - {DOMElement}
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* base - {String}
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*/
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initialize: function(element) {
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OpenLayers.Control.prototype.initialize.apply(this, arguments);
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this.element = OpenLayers.Util.getElement(element);
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},
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/**
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* Method: draw
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*
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* Returns: {DOMElemen}t
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*/
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draw: function() {
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OpenLayers.Control.prototype.draw.apply(this, arguments);
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if (!this.element) {
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this.element = document.createElement("div");
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this.div.className = this.displayClass;
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this.element.style.fontSize="smaller";
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this.div.appendChild(this.element);
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}
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this.map.events.register( 'moveend', this, this.updateScale);
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this.updateScale();
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return this.div;
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},
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/**
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* Method: updateScale
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*/
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updateScale: function() {
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var scale = this.map.getScale();
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if (!scale) return;
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if (scale >= 9500 && scale <= 950000) {
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scale = Math.round(scale / 1000) + "K";
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} else if (scale >= 950000) {
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scale = Math.round(scale / 1000000) + "M";
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} else {
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scale = Math.round(scale);
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}
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this.element.innerHTML = "Scale = 1 : " + scale;
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},
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CLASS_NAME: "OpenLayers.Control.Scale"
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});
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